Method of making acid-proof containers



May 11 1926. 1,584,413

R. M. WARNER METHOD OF MAKING ACIDPROOF CONTAINERS Original Filed July 14. 1925 314.11m 1 (or aymon CZ War 22 6 y dm: un,

Patented May 1l, 1926.

RAYMOND M. WARNER,

PANY, .OF AKRON,

OF AKRON, OHIO, ASSIGNOR TO THE MILLER RUBBER GOM- OHIO, CORPORATION OI' OHIO. l

METHOD OF MAKING ACID-PROOF CONTAINERS.

Original application led Jfu1y14, 1925,

This application is a division of an application filed by me in the United States Patent Oice on the 14th day of July, 1925, vSerial No. 43,528;

The present invention aims to provide a simple and economical method for manufacturing a container for acids, comprising Aa metal drum having a rubber lining secured `thereto in such a manner that it will be preventedfrom sagging away from the walls of the drum, and the invention includes the novel method hereinafter described and de' fined by the appended claims. l

In order that the invention may be better understood, reference is made" to the accompanying drawing, in which Figure 1 is a sectional view of a container at one stage of the manufacture.

lig. 2- is a similar view at another stage, an v Fig. 3 is a similar view of the completed drum or container.

In proceeding according to my invention, I rovide a cylindrical sheet-metal drum bo y 1 open at both ends and provided adjacent to, but spaced from its ends with internal annular shoulders 1a which may be conveniently formed by rolling channels in the exterior surface of the drum, or in an analogous manner. The ends are preferably provided with outwardly turned anges 1" designed for head securing purposes, as

hereinafter described.

The heads are indicated 'at 2 and are prof vided with cylindrical portions 2 designed to fit within the ends of the body portion and with outwardly turned flanges 2b designed to cooperate with the flanges 1".

Griven such a container in their unassembled condition, the interior surfaces are thoroughly cleaned, preferably by sand blasting, whereon they may be given a coat of rubber cement which is vulcanized thereon in a suitable manner, asby means of sulphur chloride. Thereafter I apply to the interior surface of the drum body one or more layers of vulcanizable compound, preferably using two layers, indicated respectively at 3 and 4, and in the event thattwo layers are used, the inner -of these .layers 4. is preferably formed of a compound which will only partiall cure at the temperature which is require to completely cure the layer 3. This lininglayer or layers, of vulbody and heads4 Serial No. 43,528. Divided and this-app1ication tiled January 8, 192e. semi no. 80,056.

canizable rubber, extends' sufficiently beyond the shoulders 1 .to enable the Vprojecting portion to be rolled upon itself in the form of, or to produce beads which overl'ie and are juxtaposed to the shoulders 1a, such beads beingl indicated at 3a. Thereafter I apply to' t e inner surface of the lining layer or layers, a lining of unvulcanizable lIl() rubber compound indicated at 5, which is preferably of laminated form, that is, coinposed of two su erposed sheets vof unvulcanizable materia, that is, material which will'remain unvulcanized when subjected to the tem erature which completely vulcanizes the ayer 3 and partially vulcanizes the layer 4.

The unvulcanizable lining is carried up around and over the outer surfaces of the beads as shown. In a similar manner the heads are lined with vulcanizable and unvulcanizable layers, preferably in thesame manner, tol wit, a completely vulcanizable head layer 6, a partially vulcanizable juxtaposed layer 7, and a laminated unvulcanizable layer 8.

After the lining layers have been applied as above described, the container parts are subjected to the necessary vulcanizing temperature, preferably in a dry heat oven, and the' end closure members are then applied to the container body with the margins of the unvulcanized lining- 8 pressed against the unvulcanized bead coverings. One or both of the contacting unvulcanized rubber parts may be moistened or softened with a rubber solvent such as gasoline, to secure av more intimate union.

After the heads have may be secured in any suitable manner, as for example by `rolling together the flanges 1b and-2". i

Having thus described my invention, what I claim is been applied they 1. The hereindescribed method of making unvulcanizable rubber'with its edges over-l lying said beads, appl ing to the heads layers of respectively vu canizable and unvulcanizable rubber with the unvulcanized layer exposed, subjecting the body and heads to vulcani-zing temperature, and thereafter securing the heads to the body with the unvulcanized layers thereof pressed against the beads. i

2. The method of claim 1, in'which the body and heads are first coated with rubber cement which is cured before application of the vulcanizable layer.

3. The method of claim 1, in which the are adapted respectively to be Wholly and partially cured. l y

v 4. The proce of claim 1, in which the unvulcanized covering of the beads is softened by rubber solvent heads. v f A In testimony whereof, I aix my signature.

RAYMOND M. WARNER.

prior to application of the- 

